1 //===- SymbolSerializer.cpp -----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "llvm/DebugInfo/CodeView/SymbolSerializer.h" 10 #include "llvm/ADT/ArrayRef.h" 11 #include "llvm/Support/Endian.h" 12 #include "llvm/Support/Error.h" 13 #include "llvm/Support/ErrorHandling.h" 14 #include <cassert> 15 #include <cstdint> 16 #include <cstring> 17 18 using namespace llvm; 19 using namespace llvm::codeview; 20 21 SymbolSerializer::SymbolSerializer(BumpPtrAllocator &Allocator, 22 CodeViewContainer Container) 23 : Storage(Allocator), Stream(RecordBuffer, support::little), Writer(Stream), 24 Mapping(Writer, Container) {} 25 26 Error SymbolSerializer::visitSymbolBegin(CVSymbol &Record) { 27 assert(!CurrentSymbol && "Already in a symbol mapping!"); 28 29 Writer.setOffset(0); 30 31 if (auto EC = writeRecordPrefix(Record.kind())) 32 return EC; 33 34 CurrentSymbol = Record.kind(); 35 if (auto EC = Mapping.visitSymbolBegin(Record)) 36 return EC; 37 38 return Error::success(); 39 } 40 41 Error SymbolSerializer::visitSymbolEnd(CVSymbol &Record) { 42 assert(CurrentSymbol && "Not in a symbol mapping!"); 43 44 if (auto EC = Mapping.visitSymbolEnd(Record)) 45 return EC; 46 47 uint32_t RecordEnd = Writer.getOffset(); 48 uint16_t Length = RecordEnd - 2; 49 Writer.setOffset(0); 50 if (auto EC = Writer.writeInteger(Length)) 51 return EC; 52 53 uint8_t *StableStorage = Storage.Allocate<uint8_t>(RecordEnd); 54 ::memcpy(StableStorage, &RecordBuffer[0], RecordEnd); 55 Record.RecordData = ArrayRef<uint8_t>(StableStorage, RecordEnd); 56 CurrentSymbol.reset(); 57 58 return Error::success(); 59 } 60